How many moulds required for the compression strength test of cement?

Initial setting time of OPC should not be less than _______

On cooling below 1250oC, C3S decomposes ________

If t1=Time at which water is first added to cement, t2=Time when needle fails to penetrate 5 mm to 7 mm from bottom of t…

C4AF is not a true compound.

Insoluble Residue mainly comes from which compound?

Silica in excess causes ____

In the soundness test a specimen of hardened cement paste is ___ for a fixed time.